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, 2020
The current measurement techniques described in the literature for the determination of the carbonyl index (CI) for polyolefins such as polyethylene and polypropylene were compared and contrasted. These were all found to be inconsistent or inaccurate and
J. Almond +4 more
semanticscholar +1 more source
The current measurement techniques described in the literature for the determination of the carbonyl index (CI) for polyolefins such as polyethylene and polypropylene were compared and contrasted. These were all found to be inconsistent or inaccurate and
J. Almond +4 more
semanticscholar +1 more source
FTIR Spectroscopy of Metalloproteins
2014Absorption of infrared radiation by proteins gives important information about their structure and function. The most intense infrared bands correspond to the overlap of all the peptide bond absorption. Additionally, in many metalloproteins their prosthetic groups have intrinsic ligands or bind substrates/inhibitors that absorb intensively in the ...
Oscar, Gutiérrez-Sanz +2 more
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Tetrafluoroethylene: high resolution FTIR spectroscopy
Phys. Chem. Chem. Phys., 2002High resolution FTIR spectra of tetrafluoroethylene (TFE) were measured in a cell cooled to approximately 160 K. Rovibrational analyses of ν9, the b-type band at 1339.9 cm−1 and ν11, the a-type band at 1187.6 cm−1 led to assignment of 2691 and 3101 lines respectively, with Jmax = 87. Ground state combination differences generated from these transitions
Evan G. Robertson +3 more
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FTIR spectroscopy applied to woodflour
Composite Interfaces, 1996The features of infrared spectra of woodflour obtained by transmission and diffuse reflectance (DRIFT) are discussed. Intrinsic differences between the two techniques, as well as differences in sample preparation for transmission (pressed pellet) or DRIFT (simple mixing with powered KBr), affect the appearance of the spectra recorded.
N.E. Marcovich +2 more
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FTIR Spectroscopy of Flavin-Binding Photoreceptors
2014Light-induced difference Fourier transform infrared (FTIR) spectroscopy is a powerful, sensitive, and informative method to study structure-function relationships in photoreceptive proteins. Strong absorption of water in the IR region is always problematic in this method, but if water content in the sample is controlled during measurements, this method
Daichi, Yamada, Hideki, Kandori
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, 2020
In recent years, there has been an increase in the use of spectroscopy as a diagnostic tool. This review aims to summarize the studies that have reported the use of ATR-FTIR spectroscopy for the acquisition of spectral signatures from saliva, blood and ...
Khulla Naseer, Salmann Ali, Javaria Qazi
semanticscholar +1 more source
In recent years, there has been an increase in the use of spectroscopy as a diagnostic tool. This review aims to summarize the studies that have reported the use of ATR-FTIR spectroscopy for the acquisition of spectral signatures from saliva, blood and ...
Khulla Naseer, Salmann Ali, Javaria Qazi
semanticscholar +1 more source
Matrix FTIR spectroscopy of transient species
Annual Meeting Optical Society of America, 1989Matrix studies featuring the FTIR instrumental advantages of resolution and sensitivity for a finite amount of time are described. Ammonia clusters have a complicated spectrum in the N–H stretching region. One antisymmetric and two symmetric stretching modes in the dimer verify an asymmetric cyclic dimer structure.1 Chlorine isotopic splittings have ...
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FTIR spectroscopy of microemulsion structure
Langmuir, 1986Etudes de la structure d'une microemulsion eau dans huile formee en presence d'Aerosol OT (bis(ethyl-2 hexyle) sulfosuccinate de Na)
H. MacDonald, B. Bedwell, Erdogan Gulari
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FTIR spectroscopy of borate crystals
SPIE Proceedings, 1999ABSTRACT Infrared absorption spectroscopy has been used to study the vibrational modes in various borate crystals, the electronictransitions of Nd3 ions in NYAB, and the stretching vibration of hydroxyl ions in CLBO ciystals.Keywords: borates, CLBO, YAB, FTIR spectroscopy, vibrations, Off ions 1.
Laszlo Kovacs +3 more
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ACS Catalysis, 2019
A Cu/SSZ-13 catalyst containing predominately Z2Cu sites is prepared. Using FTIR spectroscopy, two nonsteady-state measurements, (1) continuous NO titration of an NH3 saturated catalyst and (2) intermittent NO on/off cycles during quasi-steady state (i.e.
Yani Zhang +7 more
semanticscholar +1 more source
A Cu/SSZ-13 catalyst containing predominately Z2Cu sites is prepared. Using FTIR spectroscopy, two nonsteady-state measurements, (1) continuous NO titration of an NH3 saturated catalyst and (2) intermittent NO on/off cycles during quasi-steady state (i.e.
Yani Zhang +7 more
semanticscholar +1 more source